3016381221 has 64 divisors (see below), whose sum is σ = 5172572160. Its totient is φ = 1701725760.

The previous prime is 3016381217. The next prime is 3016381273. The reversal of 3016381221 is 1221836103.

It is a happy number.

3016381221 is a `hidden beast` number, since 3 + 0 + 1 + 638 + 1 + 2 + 21 = 666.

3016381221 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3016381221 - 2² = 3016381217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3016381021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7164591 + ... + 7165011.

It is an arithmetic number, because the mean of its divisors is an integer number (80821440).

Almost surely, 2^3016381221 is an apocalyptic number.

It is an amenable number.

3016381221 is a deficient number, since it is larger than the sum of its proper divisors (2156190939).

3016381221 is a wasteful number, since it uses less digits than its factorization.

3016381221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 3016381221 is about 54921.5915738064. The cubic root of 3016381221 is about 1444.8698966127.

The spelling of 3016381221 in words is "three billion, sixteen million, three hundred eighty-one thousand, two hundred twenty-one".